I think the odd you saw on Stake is as a result of the current form of Real Madrid, losing against Valencia for Real Madrid would have been a bigger problem for Real Madrid if Barcelona should have won against Real Betis because 6 points gap between Barcelona and Real Madrid wouldn't have been an easy one for Real Madrid to catch up and Arsenal play a 1:1 draw against Everton though nothing to say about the game because Everton may not be in the best of form but they hardly lose against big teams this season but the real game will be in the champions League competition game which Real Madrid still remains one of the favorites in the competition regardless of their poor performances in their league matches.
Real Madrid performance against Valencia is a set back for them in the Laliga title race, they could have been in big trouble if Barcelona have won their match instead of playing a draw because the six points gap will be very difficult to cover up especially as they still have match to be played against Barcelona, and that match can be a determining factor for the title race.
3.15 odd for Real Madrid team to win against Arsenal is a good odd and 3.25 odd for a draw is a nice odd if you ask me I think Stake is given bettors opportunities to take the advantage to win because I still find it difficult to believe that Arsenal win against Real Madrid in England because Real Madrid team doesn't joke when it comes to this stage in the champions League.
Why do you still find it difficult to believe that Arsenal can win Real Madrid? But you are convinced that it’s a game that made Real Madrid to lose to Valencia.
These odds are very ok, it’s indeed an opportunity to win good money, but Arsenal shouldn’t be taken for granted because they also have good squad to defeat Real Madrid, even though Gabriel is injured and Arsenal defense will not be as strong as it used to be when he is available; but they can still prove something.